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Poultry vaccines
Disease prevention by vaccination is an integral part of flock health management protocols. Active immunization using live vaccines is the current industry standard. Routinely used vaccines in chickens include MDV, NDV, IBV, and IBDV, and in turkeys NDV and HEV. Newer vaccines, including molecular recombinants in which genes of immunogenic proteins from infectious agents are inserted into a live viral vector, are also being examined for commercial use. Efforts are under way to enhance vaccine efficacy by the use of adjuvants, particularly cytokines. The vaccine delivery systems include in ovo injection, aerosol, spray, drinking water, eye drop, and wing web injection. The in ovo vaccination procedure is relatively new and at the present time it is used primarily to vaccinate broiler chickens against MDV. Birds respond to vaccines by developing humoral and cellular immune responses. There are two main types of vaccine available for poultry: live or killed.
1. Introduction The ongoing pandemic of a highly pathogenic avian influenza virus (HPAIV) of subtype H5N1 (goose/Guangdong lineage [gs/GD]), clade 2.3.4.4b, is posing an unprecedented threat, impacting both industrial and small-scale poultry operations [1,2]. Similarly, HPAIV infections in wild birds, particularly those leading to mass mortalities among colony-breeding species, are exerting significant pressure on avian biodiversity [3,4]. The recent increase in spillover...
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Brian Jordan (University of Georgia) explains how False Layer Syndrome affects poultry and what can be done to prevent it, in this Engormix interview during IPPE 2024 in Atlanta, USA....
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Introduction Avian metapneumovirus (aMPV) is a virus that causes respiratory and reproductive distress in chickens and turkeys. This condition leads to impaired performance and increased mortality, particularly when accompanied by secondary infections. While the virus has traditionally been downplayed in broilers, recent field investigations have highlighted the direct implication of aMPV in respiratory problems (Al-Hasan et al., 2022; Nguyen et al., 2021; Franzo et al., 2017;...
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Author details: 1 Federal University of Santa Maria (UFSM), Veterinary Medicine Graduate Program, Master in Animal Health and Reproduction, Santa Maria, Brazil; 2 Federal University of Santa Maria (UFSM), Department of Animal Science, Santa Maria, RS 97105-900, Brazil; 3 Federal University of Santa Maria (UFSM), Center for Rural Sciences, Department of Preventive Veterinary Medicine, Laboratory of Diagnosis of Avian Pathologies, Santa Maria, Brazil; 4 Santa Catarina State...
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Dr. Prakash Reddy from Ventry Biologicals outlines the major respiratory threats in Indian poultry, including emerging ND genotypes and multiple IB variants. ...
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Deepak Khosla from the Venkys Group highlights steady growth in India’s poultry sector alongside rising challenges: mycotoxins, biosecurity gaps, and weakened immune responses. He stresses strict vaccination programs, strong biosecurity after global avian influenza events, and better water and shed management. With climate-driven grain contamination increasing, producers must adopt precise solutions to protect flock performance. ...
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Respected Srs, greetings. I have high water PH in my farm and I used citric acid as acidifier to reduce the PH .Has the acidified water by citric acid any effect on live vaccine that sometimes I used . ...
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I. INTRODUCTION The basis for effective control of Salmonella infections in poultry production is good farm management and hygienic practices as well as testing and elimination of positive flocks in some countries. While many different measures have been recommended in meat chicken farms, vaccination with live-attenuated vaccines is likely to have a central role in the reduction of Salmonella in commercial operations by increasing the passive immunity of birds and...
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A Natural Choice for Growth Enhancement in Farm Animals - 3 ESSDENDIS
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I would be grateful if somebody could explain me: A flock was vaccinated with Ma 5 and clone 30. Sample collected 3 weeks post vaccination. Using Elisa the response to IB was low although within the expected range. Elisa was conducted for Mg. Ms., ART. In addition to AI, the titer was normal. PCR was conducted only Ms was detected at Ct 29. I would like to ask why the mean titer of Ms was low. ...
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1. Introduction Avian Reovirus (ARV) poses a significant threat to the poultry industry, infecting both domestic and wild avian species. ARV infections manifest in a diverse range of clinical signs, encompassing tenosynovitis/arthritis, immunosuppression, enteric disease, hepatitis, myocarditis, malabsorption, and runting–stunting syndrome [1,2]. While domestic avian species are generally susceptible to ARV, meat-type chickens and turkeys [3,4] are, however, more susceptible to...
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Dear my colleagues I would be grateful if somebody tell me-
1- the advantage of mycoplasma gallisepticum ts-11 vaccine
2- its limitations
3-duration of immunity and when to count it from start of injection , onset of immunity or when the vaccine reach its peak
regard...
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Dr. Ioannis Mavromatis, MEA Technical Sales Consultant for Calier, explores how Salmonella threatens poultry producers in the Middle East and North Africa. He discusses its impact on human health, farm contamination, and the role of vaccination, biosecurity, and farm management in controlling outbreaks....
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1. Introduction Salmonella Enteritidis (SE) is one of the most prevalent serovars involved in the contamination of chicken products that cause human infection via the consumption of inadequately cooked chicken meat and eggs [1–4]. Because adult chickens with non-typhoidal Salmonella infection do not exhibit signs of illness, they can remain carriers, releasing the bacteria into the environment through their feces [3]. The poultry industry aims to decrease Salmonella...
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Dr. Ioannis Mavromatis, MEA Technical Sales Consultant for Calier, discusses Salmonella’s impact on poultry in the Middle East and North Africa. He covers its risks to human health and farm contamination...
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Srinivasa Farms and Hy-Line: Pioneering Growth in India’s Poultry Market
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Infectious laryngotracheitis virus ILTV represents an important problem in production of chickens. The disease causes respiratory symptoms but also affects production of eggs, chicken body weight and finally mortality. As in case of other herpesviruses including Marek’s disease virus one of the most important aspect remains biosecurity. The most popular vaccination is based on attenuated ILTV strains (SA2 and A20, Pfizer) and (Serva, Intervet). However in...
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Matias Jansen (Kemin Biologics) shares insights on avian influenza and hepatitis threats in this Engormix interview during IPPE 2025 in Atlanta, USA....
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Modern poultry production allowed to increase the productivity at the farm level. As a consequence, a higher susceptibility of the birds to different bacterial or viral diseases in the poultry houses due to changing conditions like the concentration of the birds, multi-age sites, increased genetic potential but more fragile birds. Biosecurity and farm management are the basics to limit the effects of this higher susceptibility....
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Brian Jordan (Zoetis) talks about the usefulness of vaccine takes to evaluate correct application and how vaccines interact with each other, in this Engormix interview during IPPE 2025 in Atlanta, USA....
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Vijay Durairaj (Huvepharma) discusses lesions, PCR sequencing, and vaccination strategy in this Engormix interview during IPPE 2025 in Atlanta, USA....
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